When I was playing destiny, I got 2 exotic helmets..( I'm a hunter ) but one was for Warlock and the other was for Titan. I was very mad at this because my Warlock and Titan were level 3 so that means that I would have to spend even more time on both of my gaurdians to level them up to 20 so that I can equip the exotic helmets? If there was a trading system then I could just trade another class gaurdian that has a exotic hunter helmet!!!!! So please update destiny with trading!!!